Gas analysis apparatus



J1me A. B. COSTELLO GAS ANALYSIS APPARATUS Filed Oct. 25, 1939 NEUTRAL ATTORNEYS Patented June 3, 1941 U NE T E sir-Es ANALYSIS APPARATUS Alfred Costello, Niagara Falls, N. Y.

Application October 25, 1939; Sle rilal No. 30 1 277 a 4 calls. (or. aha.) 7 I to provide apparatus "of this type which veniently portable."

A further objectris to provide apparatus of this character which will be formed of Ta" ewf'strong' simple and durable parts Whichjwill be inex'peh sive to manufacture and which will not'easily get out of order. With the above and other objects in view the invention consists or certain novel details of construction and combinations of' partsherein after fully described and claimed, it beingj'understood that various modifications may beresorted to within the scope of the appended claims without departing from the spirit" onsacrificing any" of the advantages of the invention. In the accompanying drawing forming part of this specification'- Figure 1 is a front elevation of the apparatus in normal position. Figure 2 is a side elevation of the apparatus shown in Figure 1.

Figure 3 is a front elevation of tilted anti-clockwise.

Figure 4 is a plan view of the movable top the apparatus member of the control valve showingthe pas-' sages thereof.

Figure 5'is a plan View of the stationary bottom member of the valve showing the ports thereof. L

Figure 6 is a diagrammatic View of the valve in neutral position.

Figure '7 is a diagrammatic View of the valve in characters of reierence designate similar parts in the: various views; lg desiglri atesfz'a" revoluble frame whammy be" simply a" board having at the top and bottomther'eof f ange I I andl2" the latter formihg'a su pcrr'upon' whichth framemay befd posed in vertical positionin both" sampie rceivingposition andfiri the "CO2meas" uring position. 'The'frame' inayfbe rotated anticlockwise through an angular advance "of "'90", as showfi'iri Figure 31110 ab sorptionfposition;

Mounted n the frame, than in'clined'position of about"5l'tothej'horizontal; isaburettel3' having a scale it disposedldngitudinallyfthereof.

The so ale is secured to?" the burette near the oppo'site'n'ds by strap brackets'lfi and I63" One end of the burettec'ommunicatjes with a reservoir ll and the opposite end of the "burette also communicates "with a reservoir" l 81 bothextendingffrom th'esame side of the burette' at a substantially? right angle thereto a'ndfin which a mercury supply' I9"may* be interchangeably received as the apparatus" is tilted'from" the posi-'- tionshown in Figure 1 to the'position" shownin Figure 3, to forma mercury pump. absorption cha lqer '2ll is disposed on the frame It in a position to pass acrossand underneath the "burette and scale at substantially a right angle, and is "secured tothe frame by a strap bracket 21." The absorption chamber may be any suitableCOz absorptionchamber used for the purpose of analyzingjexhaust gases. "Disposed in the absorption chamber is a bubbling tube 22 whichextends longitudinallybf the chamber to the bottom thereof and theabsorbent is preventedfrorn' enteringth'e bubbling" tube through the medium of a mercury seal 23. A

neck '24 is formed on "the absorption chamber andis closedby'aplug 25 to permit cleaning 'arid refilling of theabsorptionchainber.

Acontrol"valve"2t"is mounted on the base near theto-pthereoffas best shown in Figural, and comprises an upper revoluble member 2lfland a lower stationary member 28. The; upper mend her isprovmea a hand lever 29 whichte'rnii'nat'es ina pointer 30. The pointeris rnovable over eschew; fixed tofth'e upper flange ll and marked with letters sgfrhfiirzil NJ? rorj'r specuveiy; denoting"san ple, 'reading, absorp tion, and man ra? vpositions of the valve. 'Ifhe upper member is rotatablyniounted on the lower e h l he. med um of a p e nd a helical spririg fiw'ji is confined under tension between a. nut 34 on the pin and the top. of the, upper member .2 l of the valve to hold the valve. in adjusted positions.

The sample to be tested may be taken from a flue 35 through the medium of a tube 36 which is secured to the base l and is connected to a pipe 37 which is controlled by a four-way stopcook 38, as best shown in Figures and 11.. The stopcock permits a sample being run through the absorption chamber more than once before being released into the atmosphere. The stopcock is provided with a radial passage 33 which communicates with an axial passage to which opens into the atmosphere. The stopcock is also provided with a circumferential passage 4| adapted to cross connect a pipe 52 with the gas admitting pipe 3'! or to cross connect the pipe @2 with a pipe 43.

The pipes 42 and 43 open through the bottom member of the control valve 26. A pipe i l is connected at one end to the outer end of the reservoir I9 and at the other end opens through the bottom member of the control valve 2%. A pipe 55 is connected at one end to'the outer end of the reservoir I8 and opens at the other end through the bottom member of the control valve. A pipe 48 is connected at one end to the top of the bubbling tube 22 and opens at the other end through the bottom member of the control valve. A pipe 41 is connected at one end to the end of the absorption chamber near the outlet end of the bubbling tube and opens at the other end through the bottom member of the control valve. the control valve is provided with a pair of arcuate passages 48 and 49 adapted to connect these pipes in a predetermined sequence in mak ing a test as will now be described.

The control valve is in the position shown diagrammatically in Figure 7, and the stopcock is in the position shown in Figure 10, and the base It] is in the position shown in Figure 1 when a sample is being taken. The valve handle is first turned to S. The arcuate passage d8 of the control valve then connects the pipes 42 and 1-; so that the sample from the flue may pass into the pipe id above the mercury in the reservoir l9. At the same time, the arcuate passage 49 connects the pipes 45 and &3 so that atmospheric pressure may enter the pipe A5 and the reservoir l8. With the valves set as above described, the base It] is now rotated clockwise through an angle of 45 to the position shown in Figure 3. The mercury runs down into the reservoir l8 and pumps the sample into the reservoir l9 and pipe M.

After the sample is thus pumped into the reservoir [9, the next step is to pump the sample out of the reservoir l9 into the absorption chamber 20. To accomplish this the valve handle is turned to A, so that, as shown in Figure 8, the arcuate passage 48'connects the pipes 44 and 46 and the arcuate passage 49 connects the pipes 41 and 45. Then the base IE) is turned anticlockwise through an angle of about 45. The mercury then runs back into the reservoir I! again, as shown in Figure l, and pumps the sample from the reservoir ll, through the pipe dd, pipe 46, bubbling tube 22, and through the mercury seal 23 in the absorption chamber 20.

After absorption has taken place, the next step is-to take a reading. To accomplish this the apparatus is held steady in the position shown in Figure 1 and the valve handle. is turned to R position. In this position of the valve, as shown in Figure 9, the arcuate passage d8 connects the pipes 42 and 44 and the arcuate passage 49 connects the pipes 31 and 45. A vacuum The upper member 2'l of.

is created in the absorption chamber through the absorption of CO2 by the caustic solution in the chamber during the passage therethrough of the gases. The stopcock is now turned to the position shown in Figure 2 to dispose the radial air vent 39 in registration with the pipe 42. Vacuum exerted through the pipes 41 and 55, reservoir l8, and burette I3 coacts with air pressure through the pipes 2 and G4 exerted upon the mercury in the reservoir I9, to cause the mercury to rise in the burette l3 so that a reading may be taken on the scale M.

Figure 6 shows the neutral position of the a control valve. In this position the arcuate passage 48 is only connected to the pipe G1 which extends to the absorption chamber '20, and the arcuate passage 49 is only connected to the pipe 45 which is connected to the bubbling tube 22.

To send a sample through the absorption chamber a second or third time, the stopcock 38 is turned to the position shown in Figure 11 so that the circumferential passage 41 connects the pipes 42 and 43 and the operations above described are continued through another cycle.

In lieu of mercury, color solutions may be used. The gas absorbent used corresponds to the gas to be analyzed, such as KOI-I for C02. The reading scale 22 is calibrated to suit the gas to be tested.

By referring to Figure 2, it will be seen that the tube 36 is rigid and forms an axis of rotation for the base l0 so 'that the apparatus may be operated quickly while attached to the flue 35 and thus a greater number of tests may be made in less time than ordinarily can be made. This time saving advantage is also promoted because the device is light and compact and therefore easily portable to be applied selectively to any number of dues or the like.

From the above description it is thought that the construction and operation of the invention will be fully understood without further explanation.

What is claimed is:

1. A portable apparatus for testing products of combustion for carbon dioxide, comprising a rotatable base, a burette extending at an angular inclination across the base. substantially 45 to the horizontal, an absorption chamber extending across the burette substantially at a about from its initial position to form a pump, a bubble pipe in the absorption chamber, a liquid seal in the absorption chamber in which the end of the bubble pipe is submerged, a 'control valve, and respective pipes connecting both of the reservoirs, the bubble pipe, the absorption chamber and the atmosphere with the conr01 valve, a tube projecting through the base for conducting gas to be treated to the control valve, said control valve having a rotatable part adapted to connect said pipes in predetermined sequence, the arrangement being such that at one setting of the valve the base may be rotated clockwise from its initial position to suck said gas into one of the reservoirs, at another setting of the valve the base may be rotated anti-clockwise back to its initial position to expel the gas through the bubble pipe into the absorption chamber, and at another setting of the valve atmospheric pressure is admitted on top of the liquid in the lowermost reservoir to coact with the vacuum created in the other reservoir and in the burette by absorption in the absorption chamber and cause the liquid to rise in the burette so that a reading may be obtained on said scale.

2. The structure as recited in claim 1 but in which the pipe connecting the control valve to the atmosphere includes a stopcock adapted also to return tested gas a plurality of times to the control valve for retesting, in addition to connecting the control valve to the atmosphere.

3. The structure as recited in claim 1 but in which the tuhe which conducts gas to be treated to the control valve is rigid and forms an axis of rotation for the base when the tube is in sorted in a flue from which gas is to be tested.

4. The structure as recited in claim 1 in which the control valve is provided with a rotary part associated with a handle lever forming a pointer movable over a dial bearing characters indicat- 10 ing various settings of the control valve.

ALFRED B. COSTELLO. 

